Water → HCID 178448100, compound

To 5.17 g of the nitrile previously prepared was added 30 ml of a mixture of water and conc. sulfuric acid (1:1) and the mixture was stirred for three hours at 110° C. to 130° C. After cooling to room temperature, the reaction mixture was poured into 60 ml of water and extracted with ethyl acetate, and then the extract was concentrated under reduced pressure. To the residue was added 30 ml of 1N aqueous solution of sodium hydroxide and the mixture was stirred for five minutes at room temperature. The alkaline aqueous solution was extracted with diethyl ether to remove the neutral substance, and the remaining aqueous solution was adjusted again to pH 3 with 3N hydrochloric acid and extracted with ethyl acetate. The extract was washed with water and a saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give 1.91 g of cis-4-propylcyclohexanecarboxylic acid as crude product having the following physical data:

1. extractionextracted with ethyl acetate
2. concentrationthe extract was concentrated under reduced pressure
3. additionTo the residue was added 30 ml of 1N aqueous solution of sodium hydroxide
4. stirringthe mixture was stirred for five minutes at room temperature
5. extractionThe alkaline aqueous solution was extracted with diethyl ether
6. customto remove the neutral substance
7. extractionextracted with ethyl acetate
8. washThe extract was washed with water
9. dry with materiala saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate
10. concentrationconcentrated under reduced pressure

ORD record

ord-b5b3625fba924e9fad9477f2f9e58d39

Source dataset

uspto-grants-1990_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04935446